A researcher wants to determine the proportion of elm trees in Windsor, Ontario, dying of Dutch elm disease. Past experiments, based on large sample sizes, have shown this proportion to be 0.3. What sample size does the researcher need in order to estimate this proportion to within 0.04 with 95% confidence? Justify your conclusion.

Question

Quizplus · Accepted Answer

The Answer of A researcher wants to determine the proportion of elm trees in Windsor, Ontario, dying of Dutch elm disease. Past experiments, based on large sample sizes, have shown this proportion to be 0.3. What sample size does the researcher need in order to estimate this proportion to within 0.04 with 95% confidence? Justify your conclusion.

A Researcher Wants to Determine the Proportion of Elm Trees